Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 274 - Nonferrous metals manufacturing
Subchapter XXIII - Primary Nickel and Cobalt
Section NR 274.234 - New source performance standards

Universal Citation: WI Admin Code ยง NR 274.234
Current through August 26, 2024

Any new source subject to this subchapter shall achieve the following standards:

Table 23-9

Primary Nickel and Cobalt Raw Material Dust Control

NSPS

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of copper, nickel, and cobalt in crushed raw material

Copper

0.099

0.047

Nickel

0.042

0.028

Ammonia (as N)

10.260

4.512

Cobalt

0.011

0.005

Total suspended solids

1.155

0.924

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 23-10

Primary Nickel and Cobalt Nickel Wash Water

NSPS

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of nickel powder washed

Copper

0.043

0.021

Nickel

0.019

0.013

Ammonia (as N)

4.515

1.985

Cobalt

0.005

0.002

Total suspended solids

0.508

0.406

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 23-11

Primary Nickel and Cobalt Nickel Reduction Decant

NSPS

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of nickel produced

Copper

16.250

7.744

Nickel

6.982

4.697

Ammonia (as N)

1,692.000

743.900

Cobalt

1.777

0.889

Total suspended solids

190.400

152.300

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 23-12

Primary Nickel and Cobalt Cobalt Reduction Decant

NSPS

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of cobalt produced

Copper

27.390

13.050

Nickel

11.770

7.917

Ammonia (as N)

2,852.000

1,254.000

Cobalt

2.996

1.498

Total suspended solids

321.000

256.800

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

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